The world's most famous optical illusion turns 10 years old Creative Bloq Diva's Two Tone Metallic Gold Strap Illusion Sequin Pageant Gown In 2015, a photograph of a dress went viral, dividing viewers over whether its colors were blue and black or white and gold. This optical illusion highlighted differences in human color Here's why people saw the dress differently. Color scientists explain the dress that went viral RIT 10 years since THE DRESS blew up Internet. Two thirds of people saw white and gold. Its an optical illusion caused by weird lighting and an overexposed background. It Is actuallylly blue and black.